| 摘要 |
A linear rotary bearing is disclosed which includes bearing race adapted to be mounted on a substantially cylindrical shaft in spaced concentric relationship with the shaft. A ball retainer disposed between the race and the shaft defines a plurality of longitudinally disposed ball channels. An outer housing is mounted on the exterior of the race. A plurality of longitudinally disposed ball return channels are formed between the housing and the race. An annular chamber is formed in each end of the bearing between the race and the housing. Balls placed into the bearing do not entirely fill the space available for the balls in the ball channels, ball return channels, and annular chambers. During linear motion of the bearing relative to the shaft the balls behave substantially like a fluid in the sense that they randomly move from the annular chambers into the ball channels and ball return channels to fill available space. Approximately 2.5 times more load carrying ball channels can be incorporated into the bearing of the invention than into prior art linear rotary bearings of comparable size, with a resulting increase in load carrying capacity.
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